Use 5 different Quickfire gadgets in one fight (any play mode)

Collect all of Batman's gadgets and upgrades

Rescue the third hostage from Riddler

Gib three or more enemies with a single rocket explosion.

Kill only a single enemy with a BFG9000 blast.

Finish a level with 200% armor and 200% health.

Kill 4 enemies in 1 shot with the Super Shotgun.

Finish a level with 100% items picked up.

Cause an enemy to kill another enemy.

Kill all monsters in any monster-filled level on 'Hurt me plenty' or higher.

Stop the phone booth killer

Destroy it all